Paris Noir: The other history of Paris

The city of Paris bears lots of mysteries. In a special feature which I've called Paris Noir: the other history of Paris, I am going to explore a couple of these mysteries. Has there been a phantom haunting the Opéra Garnier? What did Baron Hausmann do to Paris? Who were in the secret assembly that wrote the Encyclopedia, a book that would be a main factor in the development of the Revolution? And what, in turn, did the Revolution mean to the world? I am going to dive into the worlds of Marquis de Sade, Nicolas Flamel and Catherine de Medici, I am going to do research on royal intrigues, revolutions, alchemy, ghosts, religious wars and lots more.